What are the underlying processes occurring during an orgasm that are the biological causes of the pleasurable sensation we associate with it? Is the sensation of orgasm a function of the nervous system, or is it something neurochemical in the brain, or both, or neither? Is the reason that certain masturbatory and/or sexual acts feel good because of nerve concentration in the erogenous areas, or is it something different or more in nature? [more inside]
posted by WCityMike on Sep 2, 2008 - 9 answers

I need teaching resources about race: the biology of human "races"; why "race" is not biological but social; how racial categories have shifted over time and place; and related questions on teaching about race? This is as a supplement to reading The Mismeasure of Man in a university "Critical Thinking" class. I need more science and verifiable cross-cultural examples to back up my "there are no biological races" claim. [more inside]
posted by LobsterMitten on Nov 5, 2007 - 38 answers

Name that TV show. Gasmasks, hotel rooms, eggs and dead maids. [more inside]
posted by slimepuppy on Oct 29, 2007 - 5 answers

When I bite down lightly on the inside of my lower lip, I feel something resembling little balls moving between my teeth, as though it were full of the stuff that's inside a hacky-sack. What are those little balls? [more inside]
posted by tweebiscuit on Oct 11, 2007 - 10 answers

Okay, this is an enormous issue and I'm not finding any resources out there for help. I recently found my son's biological father. My son is 26. [more inside]
posted by nurse4kitties on Apr 12, 2007 - 43 answers

Are there any animals that have evolved a use for radioactivity? If so, what ways is it used? If not, why has this not happened? [more inside]
posted by 0bvious on Nov 23, 2005 - 32 answers

Every so often a finger on my left hand twitches involuntarily. Why is this? [more inside]
posted by biffa on Mar 18, 2005 - 8 answers